Delta CP2000 Series, User Manual

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Chapter 12 Description of Parameter Settings

CP2000
12.1-08-4
 Pr.00-04=10 (Display PID feedback (b) (%))
 Pr.01-12 Acceleration Time is set according to actual conditions.
 Pr.01-13 Deceleration Time is set according to actual conditions.
 Pr.00-21=0 to operate through the digital keypad
 Pr.00-20=0, the digital keypad controls the set point.
 Pr.08-00=1 (Negative PID feedback from analog input)
 ACI analog input Pr.03-01=5, PID feedback signal.
 Pr.08-01–08-03 is set according to actual conditions:
If there is no vibration in the system, increase Pr.08-01 (Proportional Gain (P))
If there is no vibration in the system, reduce Pr.08-02 (Integral Time (I))
If there is no vibration in the system, increase Pr.08-03 (Differential Time (D))
 Refer to Pr.08-00–08-21 for PID parameter settings.

Proportional Gain (P)
Default: 1.0
Settings 0.0
–
100.0%
 When the setting is 1.0, Kp gain is 100%; if the setting is 0.5, Kp gain is 50%.
 Determines the deviation response of Proportional gain (P). Eliminates the system error; usually
used to decrease the error and get faster response speed. It also reduces the steady-state error.
But if you set the value too high, it may cause system oscillation and instability.
 If you set the other two gains (I and D) to zero, proportional control is the only effective
parameter.

Integral Time (I)
Default: 1.00
Settings 0.00 – 100.00 sec.
0.00: No integral
 Use the integral controller to eliminate the error during stable system operation. The integral
control does not stop working until the error is zero. The integral is affected by the integral time.
The smaller the integral time, the stronger integral action. It is helpful to reduce overshoot and
oscillation for a stable system. Accordingly, the speed to lower the steady-state error decreases.
The integral control is often used with the other two controls for the PI controller or PID
controller.
 Sets the integral time of the I controller. When the integral time is long, there is a small I
controller gain, with slower response and slow external control. When the integral time is short,
there is a large gain of I controller gain, with faster response and rapid external control.
 When the integral time is too short, it may cause system oscillation.
 Set integral time to 0.00 to disable Pr.08-02.

Differential Time (D)
Default: 0.00
Settings 0.00
–
1.00 sec.
 Use the differential controller to show the system error change, as well as to preview the change
in this error. You can use the differential controller to eliminate the error in order to improve the